Quote 1
As Clover looked down the hillside her eyes filled with tears. If she could have spoken her thoughts; it would have been to say that this was not what they had aimed at when they had set themselves years ago to work for the overthrow of the human race. These scenes of terror and slaughter were not what they had looked forward to on that night when old Major first stirred them to rebellion. (7.30)
"If she could have spoken"—but she can't. She doesn't have the words. In other news, stay in school, Shmoopers.
Quote 2
Boxer passed it off as usual with "Napoleon is always right!", but Clover, who thought she remembered a definite ruling against beds, went to the end of the barn and tried to puzzle out the Seven Commandments which were inscribed there. Finding herself unable to read more than individual letters, she fetched Muriel […]
"Muriel," she said, "read me the Fourth Commandment. Does it not say something about never sleeping in a bed?" […]
With some difficulty Muriel spelt it out... "It says, 'No animal shall sleep in a bed with sheets,"' she announced finally. (6.10-6.13)
Luckily, we're much better at reading that Muriel, so we can flip back to the beginning of the book (Chapter 2, if you're wondering) and double check. And there it is—#4, "No animal shall sleep in a bed." Hm. Looks like the rules are changing on us.
Quote 3
"My sight is failing," she said finally. "Even when I was young I could not have read what was written there. But it appears to me that that wall looks different. Are the Seven Commandments the same as they used to be, Benjamin?"
For once Benjamin consented to break his rule, and he read out to her what was written on the wall. There was nothing there now except a single Commandment. It ran:
ALL ANIMALS ARE EQUAL BUT SOME ANIMALS ARE MORE EQUAL THAN OTHERS (10.17, 10.18, 10.19)
Quick answer: no, they are not. First the rule about beds is changed and then the rule about not killing animals and now, finally, the seven commandments themselves are gone, leaving just one commandment. But it's no Golden Rule—more like a brass rule. A tarnished brass rule.